County annual report · FIPS 29101
2021 Johnson County, MO Power Outage Report
In 2021, customers in Johnson County, MO went without power for an average of 4.5 hours, a total of 86K customer-hours (Missouri average 4.5 hours). That ranks 48th worst of 115 Missouri counties and 1438th of 2,974 nationally.
Compared with MO, the US and 2020
Coverage line is EAGLE-I's share of Missouri customers tracked each year.
Biggest outages in Johnson County, 2021
The 10 outage episodes with the most customers out at once. Times are UTC.
| # | Started (UTC) | Ended (UTC) | Duration | Peak out | Customer-hours |
|---|---|---|---|---|---|
| 1 | January 1, 2021 10:30 | January 3, 2021 09:45 | 1d 23h | 3,667 | 18K |
| 2 | June 11, 2021 18:30 | June 13, 2021 07:15 | 1d 12h | 2,924 | 23K |
| 3 | November 23, 2021 14:30 | November 23, 2021 22:00 | 7h 30m | 1,262 | 2,180 |
| 4 | December 15, 2021 18:45 | December 17, 2021 01:15 | 1d 6h | 1,088 | 2,311 |
| 5 | January 3, 2021 14:30 | January 4, 2021 06:30 | 16h | 976 | 1,794 |
| 6 | May 15, 2021 05:00 | May 15, 2021 08:45 | 3h 45m | 944 | 2,835 |
| 7 | May 6, 2021 14:15 | May 7, 2021 00:30 | 10h 15m | 943 | 1,059 |
| 8 | May 22, 2021 05:30 | May 22, 2021 06:30 | 1h | 941 | 798 |
| 9 | May 14, 2021 14:15 | May 14, 2021 14:30 | 15m | 940 | 235 |
| 10 | October 4, 2021 17:15 | October 4, 2021 23:00 | 5h 45m | 720 | 697 |
Outage episodes by size in 2021: 48 reached 100+ customers, 4 reached 1,000+ customers, 0 reached 10,000+ customers.
Utility reliability filed with the EIA
SAIDI (average outage time per customer) and SAIFI (average interruptions per customer) that utilities serving Johnson County reported on EIA Form 861 for 2021, or their most recent earlier filing. Utility-wide figures, not county-specific.
| Utility | EIA year | SAIDI | SAIFI | SAIDI excl. major events | SAIFI excl. major events |
|---|---|---|---|---|---|
| Evergy Metro | 2021 | 4.0 hrs | 1.57 | 1.6 hrs | 0.94 |
| Evergy Kansas Central, Inc | 2021 | 5.8 hrs | 1.68 | 1.7 hrs | 1.02 |
| Evergy Missouri West | 2021 | 5.2 hrs | 1.86 | 2.3 hrs | 1.22 |
| West Central Electric Coop Inc - (MO) | 2021 | 3.7 hrs | 1.56 | 1.6 hrs | - |
| Osage Valley Elec Coop Assn | - | - | - | - | - |
About this data
- Outage figures come from DOE/ORNL EAGLE-I, which records customers out by county every 15 minutes. EAGLE-I tracked about 95% of Missouri's customers in 2021; utilities it does not see are not counted.
- Hours per customer = outage customer-minutes ÷ 19,137 customers (ORNL modeled county customer count), including major storm days. It is comparable across counties but is not the SAIDI a utility files.
- An outage event is a continuous stretch with customers out; counts at 100, 1,000 and 10,000+ use its peak.
- Years loaded: 2015–2025. Johnson County has data for 2015–2017, 2019–2025.
Cite this report
MassOutage (massoutage.com), Johnson County, MO annual power outage report, 2021, data as of Oct 3, 2026 02:41 UTC, sources: DOE EAGLE-I (https://eagle-i.doe.gov/); EAGLE-I modeled customer counts (MCC) (https://figshare.com/); EIA Form 861 (utility reliability) (https://www.eia.gov/electricity/data/eia861/). https://massoutage.com/reports/2021/missouri/johnson-county